Construction of pipe-joints.



No. 769,442. PATENTED SEPT. 6, 1904. M. KRONAUER.

CONSTRUCTION OF PIPE JOINTS.

APPLIOATION FILED MAR. 16, 1904.

N0 MODEL.

WITNESSES: INVENTOR,

zlmm

ATTORNEY.

UNTTED STATES Patented September 6, 1904.

PATENT OFFTcE.

MAX KRONAUER, OF PATERSON, NEW JERSEY, ASSIGNOR TO T. A. GILLESPIE COMPANY, A CORPORATION OF NEW JERSEY.

CONSTRUCTION OF PIPE-JOINTS.

SPECIFICATION forming part of Letters Patent No. 769,442, dated September 6, 1904:.

Application filed March 16, 1904.

To It whom, if many concern.-

Be it known that 1, MAX KRONAU'ER, a citi- Zen of the Republic of Switzerland, residing in Paterson, county of Passaic, and State of a New Jersey, have invented certain new and useful Improvements in the Construction of Pipe-Joints; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to the construction of systems of piping, and it has reference particularly to the formation of joints between sections of, especially, sheet steel or iron piping of relatively large diameter.

The prevailing method of joining together adjacent sections of steel piping consists in inserting the end of one section into that of the other and then riveting the two together. In order to accomplish this, it is necessary that every other section be smaller in diameter than its neighbors or that each section be made of tapering form, so that adjacent sections may be telescoped. This and other methods of forming the joints are subject to one or more of the following objections: that allowance is not made for free expansion and contraction in the system under variations in temperature, with the consequence that damage results at one point or another in the system or that undesirable obstructions are formed (as by the overlapping of the ends of the sections and by the rivets holding them together) on the inside of the piping, so that the flow of the liquid therethrough is not only impeded, owing to a reduction of considerable proportions in the inner diameter at the joints, but by the formation of eddies pro duced by such obstructions, or thatlarge quantities of lead are necessary to be used to call: the joint, withthc consequence that if the system is contiguous to some electric conductor electrolytic deterioration sooner or Serial No. 198,525. (No model.)

later renders the joint leaky, or that the parts are of such nature as to involve difliculty and inconvenience in assembling and instability of adjustment.

The object of the present invention is to overcome the aforementioned and other objections attendant upon present methods of forming joints in systems of piping.

In carrying out my invention I employ between each two pipe-sections to be joined an annular body, an annular portion of which (preferably the outer annular portion) is a rigid substantial body, while the remaining annular portion e that is to say, the inner annular portion of said body is, in effect, divided transversely of the longitudinal axis of the pipe-sections to permit of a certain yielding with and under the influence of the adjacent edge portions of the pipe-sections as they move to and from each other under the effects of longitudinal expansion and contraction in the pipe-sections. The parts separated by the division in the inner annular portion of said body, moreover, are not materially spaced, but stand relatively close to each other, thus avoiding the formation of any appreciable annular cavity between them.

My invention broadly consists in a joint for pipe-sections in which a body substantially like that above described is employed.

My invention further consists in that joint modified by certain auxiliary features of construction of more or less individual value in practice, as will be hereinafter indicated in the description of the preferred form of the joint; and my invention still further broadly consists in a pipe-section and a grooved ring for securing the pipe-section to some other part, said pipe-section having-its end inserted in the groove of the ring and clamped therein by compressing the ring.

I will describe the preferred form of joint with reference to the accompanyingdrawings, wherein Figure 1 is a transverse sectional view of a system of piping having my improved joints,

the section being taken at one side of the joint.

projecting flange 5.

Fig. 2 is a longitudinal sectional view of said system of piping on the line A B in Fig. 1. Fig. 3 is a view showing in side elevation what is shown in section in Fig. 2. Fig. 4 is fragmentary View, partly in transverse section, of one of the annular parts above referred to. Fig. 5 is a view in front elevation of what is seen in Fig. 4. Fig. 6 is a fragmentary view, partly in transverse section, illustrating in detail how the uniting of each of the above-mentioned annular parts with the end of the pipe-section is accomplished, the section being also taken on the line A B in Fig. 1; and Fig. 7 is a View of what is shown in Fig. 3 as it appears from the position at right at right angles to the position from which the parts are viewed as in said Fig. 3.

It is preferred that the pipe-sections be of that form wherein two semicylindrical shells b are connected at their meeting edges by locking-bars 0, which are clamped in place after said edges have been peened up or expanded.

The reason why this form of pipesection is preferable is that it is one in which the ends are circular, overlapping being avoided. It will be understood that the locking-bars 0 are not extended to the same length as each pipe-section, but are cut off short thereof at the ends, as best seen in Fig. 2.

The annular bodyabove referred to (marked a) comprises two metallic rings (4, preferably of rolled steel, each having an outwardly- The adjacent faces of the rings a are perfectly plane or flat, while from their outer faces in the body portion of each project two annular jaws 0, forming an annular channel or groove cl. In the flange 7) of each ring a is formed a series of rivetholes 6, those of one ring registering with those of the other. Rivets (Z, passed through these holes, secure the two rings together, and thus make of them one unitary body c'. a, the annular body referred to above. The grooves cl in each ring a receive the adjoining edges of the two pipe-sections to be joined,

which latter are peened up or expanded, as at a in Fig. 6, previously to introducing them into said grooves. After being introduced into the grooves the jaws 0 are compressed togetherby suitable dies, with the result that the joint formed will be substantially a dovetailed joint. It will be understood that in practice it is preferable to join each ring to its respective pipe end before securing the rings together by the rivets.

The cutting away of the ends of the locking-bars, as above stated, is of course done to accommodate the parts a. They are therefore not cut away so far in practice as to leave any greater openings between the edges of the semicylindrical shells going to make up each pipe-section than is absolutely necessary; but such openings as are left at these points after the compression of thejaws 0 into place may be stopped up or calked by lead or in any other suitable manner, as at g in Figs. 6 and 7.

The joint thus formed overcomes all objections hereinbefore referred to. The body, comprising the rings a, is one whose outer annular portion is, in effect, a substantial integral element, while its inner annular portion may be regarded as being divided to permit of 'a certain yielding with and under the influence of the adjacent end portions of the pipe-sections as they move to and from each other under the effects of longitudinal expansion and contraction in the pipe-sections. Moreover, it requires no operation from the inside of-the pipe-sections after assemblage. Again, the series of flanges 5 throughout the system not only gives strength and rigidity thereto, but acts as supports to the pipe-sections both before and after assemblage.

' The laying of pipe systems of the kind particularly referred to is usually done during the warmer periods of the year, and in so far as that adaptation of my invention which is particularly described above is concerned it is of peculiar value to follow this custom, for then the pipe-sections will be at their maximum length and each pair of rings a face to face in all portions of the adjacent surfaces thereof, free to separate in those portions thereof which are in alinement with the pipesections when reduction of temperature and consequent contraction come.

Reference is hereby made to a copending application, Serial No. 198,526, filed March 16, 1904, for a patent for a method of forming the herein-described pipe-joint.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A joining member for pipe-sections consisting of an annular body divided in that annular portion thereof to which the pipesec tions are immediately attached in a plane transverse of the axis of said body and being thus, as to said portion, expansible and contractible under strains operating longitudinally of the parts of said axis, the parts of said annular portion thus separated being in approximate contact with each other and having their adjacent faces substantially flat, substantially as described.

2. In a joining member for pipe-sections,

the combination of two rings adapted each to be secured to one of the two pipe-sections to be joined, and means for securing said rings together along a line which is substantially concentric, but not alined, with the line of securing said pipe-sections to the rings, the portions of said rings adjacent said line being in approximate contact with each other and having their adjacent faces substantially flat, substantially as described.

3. A joining member for pipe-sections comprising two rings secured together face to face and each being thicker in a radial direction than in a direction parallel to its axis, each ringhaving parallel concentric annular jaws on its outer surface forming between them a pipe-enthreceiving groove,substantially as described.

In testimony that 1 claim the foregoing I have hereunto set my hand this 19th dayof February, 190*.

MAX KRONAUER.

Witnesses: 7

JOHN \V. Strmmm), 11: EN u DEIS S1. ['1 WARD. 

